Since $.getJSON() uses ajax configurations, just set the global ajax configs: // Set the global configs to synchronous $.ajaxSetup({ async: false }); // Your $.getJSON() request is now synchronous… // Set the global configs back to asynchronous $.ajaxSetup({ async: true });
Do not use HTMLAudioElement for that kind of application. The HTMLMediaElements are by nature asynchronous and everything from the play() method to the pause() one and going through the obvious resource fetching and the less obvious currentTime setting is asynchronous. This means that for applications that need perfect timings (like a Morse-code reader), these elements … Read more
The only time that you can wrap an async method in a synchronous one is when you don’t need to get a return value. For example if you want to disable the save button, save results to the server asynchronously and re-enable the save button when the job is done you can write it like … Read more
To block the execution of the main thread until the operation completes, you could do [operation waitUntilFinished] after it’s added to the operation queue. In this case, you wouldn’t need the return in the block; setting the __block variable would be enough. That said, I’d strongly discourage forcing asynchronous operations to synchronous methods. It’s tricky … Read more
So you want to raise the event in a manner that prevents the listeners from blocking the background thread? Gimme a couple minutes to whip up an example; it’s pretty simple 🙂 Here we go: first an important note! Whenever you call BeginInvoke you must call the corresponding EndInvoke, otherwise if the invoked method threw … Read more
I’m curious as to whether all javascript callbacks are asynchronous No. For instance, the callback used by Array#sort is not asynchronous, nor is the one used by String#replace. The only way you know whether a callback is asynchronous is from its documentation. Typically, ones involving requests for external resources (ajax calls, for instance) are asynchronous, … Read more
Always use REST. It is the most modern, advanced and scalable integration approach available today. Load balancing a REST based service is achieved simply with hardware or software HTTP load balancer and can be considered just as free as load balancing in JMS. MOM (Message Oriented Middleware) doesn’t scale easily (but may scale big enough … Read more
We modified midos answer to get it to work the following: function readFile(file){ return new Promise((resolve, reject) => { var fr = new FileReader(); fr.onload = () => { resolve(fr.result ) }; fr.onerror = reject; fr.readAsText(file.blob); }); }
Put this somewhere after the data is loaded successfully: dispatch_async(dispatch_get_main_queue(), ^{ [self.tableView reloadData]; }); This fix the problem of calling a GUI update while you’re not in the main thread. This code uses the GCD Technology from Apple to force the reload data function to run on main thread. Read more about Concurrency Programming Guide … Read more
The goal with node is not to care what order things happen in. This can complicate some scenarios. There is no shame in nesting callbacks. Once you are used to how it looks, you may find that you actually prefer that style. I do; it is very clear what order callbacks will fire. You can … Read more